KANSAS CITY, MO (KCTV) - Those who still feel groggy after drinking one cup of coffee may need to add butter to it.
It sounds strange, but more and more people in Kansas City are giving it a try.
It's called Bulletproof coffee, and it claims to help people lose weight and feel more energized.
As owner of CrossFit Memorial Hill, Matt Scanlon works out a lot.
One reason he says he's able to keep at it is by drinking Bulletproof coffee.
"That's where I noticed the best benefits ... is that I woke up feeling really recovered the next day after having had it," Scanlon said.
Bulletproof coffee is made by adding grass-fed, unsalted butter and coconut oil to regular coffee.
The creator, Dave Asprey, a California technology entrepreneur, says it helps people feel more energized and contributes to weight loss, though Asprey's own website and critics note those claims have not been evaluated by the Food and Drug Administration.
"I would completely agree with some of those criticisms. Some of them are very legit,” said Amy Bates, a Bulletproof coffee drinker.
Even so, Bates, a chiropractor in Overland Park, loves the drink and even recommends it to patients.
KCTV5 asked coffee lover Jaime Lytle to give a try after a recent morning workout.
"It's awesome. Oh my gosh, it's so good," Lytle said.
After KCTV5's Brandon Richard asked if she knew one cup contained more than 400 calories, she felt less enthused.
"Thanks for telling me! I might not drink it now," she laughed.
Another reason critics think Bulletproof coffee is a bad idea is because one serving contains so many calories. But people who drink it said they usually use it as a meal replacement.
Some, like Bates, only drink it on the weekends.
While coffee shops on the west coast are serving it, most in Kansas City are not.
Scanlon said one reason is because it can be made easily at home.